Week 2 Checkpoint

# Week 2 Checkpoint - Math 115 Chapter 2 Checkpoints 2.1 10 1...

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Math 115 Chapter 2 Checkpoints 2.1 10) 1× 66 = 66 1, 2, 3, 6, 11, 22, 33, 66 are factors of 66 2 × 33 = 66 22 × 3 = 66 11 × 6 = 66 14) 15 is a composite number: 1, 3, 5, 15 are factors 49 is a composite number: 1, 7, 49 are factors 55 is composite number: 1, 5, 11, 55 are factors 87 is a composite number: 1, 3, 29, 87 are factors 91 is a composite number: 1, 7, 13, 91 are factors 105 is a composite number: 1, 3, 5, 7, 15, 21, 35, 105 are factors 16) 59, 61, 67, 71, 73 are all prime numbers between 55 and 75 22) It is possible to divide the students into groups of 8, or 10. However, it is not possible into groups of 6: 80 ÷ 10 = 8 80 ÷ 8 = 10

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80 ÷ 6 = 13 remainder 2 2.2 20) 110 22 11 11 3) 330 5)110 2)22 1)11 3 10 2 3 10 2 3 10 2 330 = 3 × 5 × 2 × 11, is the prime factorization of 330
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Week 2 Checkpoint - Math 115 Chapter 2 Checkpoints 2.1 10 1...

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